I have a Windows 10 machine I installed before I had made the purchase (so during the trial period). I saw that nested virtualization, which is what I actually want to evaluate, was a pro-only feature, so I made the purchase and added the key. The option mentioned in the following article still doesn't appear, is it not supported or what did I do wrong?
https://kb.parallels.com/116239
https://kb.parallels.com/116239